virtual-machine-builds

Quickly build virtual machines for testing

Usage

$ ./genvm.sh \
    --installer-file udoo-bolt-live-usb.wic \
    --vm-name udoo-bolt
    --vm-size 32

List all VM

$ virsh list --all

Start VM

$ virsh start <vm-name>

Stop VM

$ virsh destroy <vm-name>

Serial Console

$ virsh console <vm-name> serial0

Remove VM

# Remove VM
$ virsh undefine <vm-name>

# Remove VM and storage
$ virsh undefine <vm-name> --remove-all-storage

# Remove VM and nvram
$ virsh undefine <vm-name> --nvram

VM Virtual Networking

vsock

Load Host/Hypervisor Kernel Modules

$ sudo modprobe -a vhost_vsock vsock_loopback

Guest VM Kernel Config Symbols

CONFIG_PCI=Y
CONFIG_VIRTIO_MENU=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_BALLON=y
CONFIG_VSOCKETS_DIAG=y

CONFIG_NET=y
CONFIG_VSOCKETS=y
CONFIG_VIRTIO_VSOCKETS=y

Host-Only Network Manual Setup

Host Only Virtual Network

https://www.kevindiaz.dev/blog/qemu-host-only-networking.html

# Create the virtual bridge and bring the interface up.
$ sudo ip link add vmbridge0 type bridge
$ sudo ip link set vmbridge0 up

# Create the tap
$ sudo ip tuntap add dev vmbridge-nic mode tap

# Bring up the interface in promiscuous mode
$ sudo ip link set vmbridge-nic up promisc on

# Make vmbridge-nic a slave of secnet
$ sudo ip link set vmbridge-nic master vmbridge0

# Give bridge vmbridge0 an IP address of 192.168.123.1
$ sudo ip addr add 192.168.123.1/24 broadcast 192.168.123.255 dev vmbridge0

Disable netfilter for bridges

$ cat > /etc/sysctl.d/99-netfilter-bridge.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-filter-vlan-tagged=0
net.bridge.bridge-nf-filter-pppoe-tagged=0
EOF

# Load the br_netfilter module
$ sudo modprobe br_netfilter

# Load the settings just set
$ sudo sysctl -p /etc/sysctl.d/99-netfilter-bridge.conf

virsh Create & Manage virtual networks

List all networks

$ virsh net-list --all

Edit Default Config

$ virsh net-edit default

Create/Start virtual network

$ virsh net-define net/vmbridge-net.xml
$ virsh net-start vmbridge-net

NFS Kernel Config Fragments

CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y

CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_ROOT_NFS=y